Viewing file:  ChainProvider.php (2.31 KB) -rw-r--r--
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<?php
declare(strict_types=1);
namespace AsyncAws\Core\Credentials;
use AsyncAws\Core\Configuration;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use Symfony\Component\HttpClient\HttpClient;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\Service\ResetInterface;
/**
* Chains several CredentialProvider together.
*
* Credentials are fetched from the first CredentialProvider that does not returns null.
* The CredentialProvider will be memoized and will be directly called the next times.
*
* @author Jérémy Derussé <jeremy@derusse.com>
*/
final class ChainProvider implements CredentialProvider, ResetInterface
{
private $providers;
/**
* @var (CredentialProvider|null)[]
*/
private $lastSuccessfulProvider = [];
/**
* @param CredentialProvider[] $providers
*/
public function __construct(iterable $providers)
{
$this->providers = $providers;
}
public function getCredentials(Configuration $configuration): ?Credentials
{
$key = spl_object_hash($configuration);
if (\array_key_exists($key, $this->lastSuccessfulProvider)) {
if (null === $provider = $this->lastSuccessfulProvider[$key]) {
return null;
}
return $provider->getCredentials($configuration);
}
foreach ($this->providers as $provider) {
if (null !== $credentials = $provider->getCredentials($configuration)) {
$this->lastSuccessfulProvider[$key] = $provider;
return $credentials;
}
}
$this->lastSuccessfulProvider[$key] = null;
return null;
}
public function reset()
{
$this->lastSuccessfulProvider = [];
}
public static function createDefaultChain(?HttpClientInterface $httpClient = null, ?LoggerInterface $logger = null): CredentialProvider
{
$httpClient = $httpClient ?? HttpClient::create();
$logger = $logger ?? new NullLogger();
return new ChainProvider([
new ConfigurationProvider(),
new WebIdentityProvider($logger, null, $httpClient),
new IniFileProvider($logger, null, $httpClient),
new ContainerProvider($httpClient, $logger),
new InstanceProvider($httpClient, $logger),
]);
}
}
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